91055-ZX2-C01 Bearing (55X100X21) - Overview. The 91055-ZX2-C01 Bearing (55X100X21) is an essential component in Honda marine engine systems. This radial ball bearing plays a critical role in supporting rotating shafts and reducing friction within the propeller shaft assembly, ensuring smooth mechanical motion and reliable operation. Designed to factory specifications, it guarantees seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Radial ba